FCM notifications not working in Android latest version OREO

Question

FCM notifications are not working in Android latest version OREO.

Below is my code:

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example">

    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/luncher_logo"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/luncher_logo"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".WelcomeActivity">
            <intent-filter>
                <action android:name="com.example.action.MAIN" />

                <category android:name="com.example.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity" />


        <service android:name=".firebase.MyFirebaseMessagingService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>
        <service android:name=".firebase.FirebaseIDService">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>
</manifest>

Answer 1

In Android Oreo making channel is important,When yo create notification you must pass the channel id,or your notification won't show up in Oreo devices.

more information

quick fix is: use setChannelId method in notification class.

 Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
  .setSmallIcon(R.drawable.ic_notif_icon)
  .setContentTitle("testTitle")
  .setContentText(messageBody)
  .setAutoCancel(true)
  .setSound(defaultSoundUri)
  .setChannelId("testChannelId") // set channel id
  .setContentIntent(pendingIntent);

complete answer in this link.

Answer 2

From Android 8.0 (API level 26+), notification channels are supported and recommended.

FCM provides a default notification channel with basic settings.

If you prefer to create and use your own default channel, set default_notification_channel_id to the ID of your notification channel object as shown below.

FCM will use this value whenever incoming messages do not explicitly set a notification channel.

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id"/>

You can create channel id from this link